When it comes to choosing the right material for your flat roof, there are plenty of things to consider. Whether you’re replacing an old, leaky roof or starting a new project, finding the best flat roof material is pivotal in durability, cost-effectiveness, and overall performance.
Table of Contents
- Roofing Felt
- Advantages of Felt Roofing
- Disadvantages of Felt Roofing
- Types of Roofing Felt
- Shed Felt
- Torch-On Felt
- Self-Adhesive Felt
- EPDM Membranes
- Advantages of EPDM Roofing
- Disadvantages of EPDM Roofing
- GRP Roofing
- Advantages of GRP Roofing
- Disadvantages of GRP Roofing
- Green Roofs
- Advantages of Green Roofs
- Disadvantages of Green Roofs
- Built-Up Roofs
- Advantages of Built-Up Roofs
- Disadvantages of Built-Up Roofs
- Flat Roof Decks
- Advantages of Flat Roof Decks
- Disadvantages of Flat Rood Decks
- Considerations in Choosing Roofing Material
- Building Regulations
- Planning Permission
- Health and Safety Considerations
- Insurance and Guarantees
- Energy Efficiency and Sustainability
- Regulations for Flat Roofs
- Insurance Requirements for Contractors
- Conclusion
- FAQs about Roofing Materials
- About Integritest
Roofing Felt
Roofing felt is one of the most common and cost-effective choices for flat roofing. It’s a tried-and-tested option that’s been used across the UK for decades.
Advantages of Felt Roofing:
- Affordable: Roofing felt is incredibly cost-effective, making it a popular choice for budget-conscious homeowners.
- Easy Installation: Roofing felt is easy to install, even for beginners. DIY enthusiasts will find it straightforward to lay down, and professional installers can do it quickly.
- Repairable: If your roof gets damaged, repairs are quick and cheap.
Disadvantages of Felt Roofing:
- Less Durable: While weather-resistant, roofing felt isn’t as long-lasting or durable as some other materials. It generally lasts around 15-20 years, though it can last longer with good maintenance.
- Appearance: Felt roofs offer a clean finish but lack the aesthetic appeal of more premium options.
Types of Roofing Felt:
1. Shed Felt:
Specifically designed for garden sheds, this lightweight option offers great value for money. It’s a simple, two-layer system that protects your outbuilding from the elements. However, it’s less durable than heavier-duty felt and typically lasts around 15 years.
2. Torch-On Felt:
Torch-on felt is a more durable option. It’s applied by melting the bitumen on the underside with a blowtorch, creating a stronger and more weather-resistant seal. Torch-on felt is more expensive than regular felt, but its durability makes it a good choice for larger projects.
3. Self-Adhesive Felt:
For a hassle-free installation, self-adhesive felt is a great option. This material comes with an adhesive backing, so all you need to do is peel and stick it onto the roof. It’s easy for DIYers to use and offers the same weather resistance as traditional felt.
EPDM Membranes
EPDM (Ethylene Propylene Diene Monomer) is a synthetic rubber membrane that offers excellent durability and weather resistance. It’s one of the best flat roof materials for those looking for a long-term solution.
Advantages of EPDM Roofing:
- Longevity: EPDM roofs can last for 40-50 years with minimal maintenance.
- Weather Resistance: Highly resistant to UV rays, temperature fluctuations, and extreme weather conditions.
- Low Maintenance: Once installed, EPDM requires very little upkeep.
- Fewer Seams: Comes in large sheets that can be easily cut and fitted to your roof therefore it requires fewer seams than other materials, which reduces the risk of leaks.
Disadvantages of EPDM Roofing:
- Cost: It’s more expensive than roofing felt. However, the long lifespan and minimal maintenance requirements make it cost-effective in the long run.
GRP Roofing
GRP (Glass Reinforced Polyester) is a lightweight, durable roofing option often used for flat roofs. It’s more expensive than roofing felt but offers significant advantages in terms of durability.
Advantages of GRP Roofing:
- Strength: GRP is one of the toughest flat roof materials, able to withstand heavy impacts and extreme weather conditions.
- Seamless Finish: It provides a smooth, seamless finish, making it less prone to leaks.
- Longevity: GRP roofs can last 20-30 years when installed correctly.
Disadvantages of GRP Roofing:
- Cost: GRP is a more costly option compared to felt or EPDM. However, its durability makes it a long-term investment.
- Installation: GRP roofs require more time and expertise to install. If you’re planning a DIY project, this may not be the best option unless you’re confident in your skills.
Green Roofs
Green roofs, also known as living roofs, are an eco-friendly option that adds beauty and sustainability to your flat roof. These roofs are covered in vegetation, which offers a range of environmental benefits.
Advantages of Green Roofs:
- Eco-Friendly: Green roofs help absorb rainwater, reduce energy consumption, and improve air quality.
- Aesthetic Appeal: They create a visually stunning green space that can be enjoyed by homeowners and wildlife alike.
- Longevity: With proper care, green roofs can last 40-50 years.
Disadvantages of Green Roofs:
- High Cost: Green roofs are much more expensive due to the installation of special trays and vegetation.
- Installation Complexity: Installing a green roof requires careful planning, including ensuring that your roof can support the weight of the plants and soil.
Built-Up Roofs
Built-up roofs (BUR) are made from layers of materials like bitumen, fabric, and gravel. They are highly durable and commonly used for commercial buildings or residential homes with flat roofs.
Advantages of Built-Up Roofs:
- Durability: Built-up roofs are incredibly durable, offering up to 60 years of protection.
- Weather Resistance: They provide excellent protection against weather conditions and wear.
Disadvantages of Built-Up Roofs:
- Cost and Installation: BURs are expensive and can be difficult to install, often requiring professional help.
- Appearance: A built-up roof’s appearance is generally limited to a gravel-covered surface, which may not be the most aesthetically pleasing.
Flat Roof Decks
If you have a flat roof with easy access, why not turn it into a rooftop terrace or deck? Aluminium decking is a great option for creating usable outdoor space on a flat roof.
Advantages of Flat Roof Decks:
- Increased Usable Space: Adding a deck can increase your property’s value and provide an enjoyable space for outdoor living.
- Durability: Aluminium is extremely durable and can withstand heavy foot traffic and extreme weather.
Disadvantages of Flat Roof Decks:
- High Cost: Aluminium decking is one of the more expensive options though still cheaper than green roofs.
- Structural Considerations: Your roof must be able to support the weight of the deck, so you may need a structural survey before installation.
Considerations in Choosing Roofing Material
Choosing the right material for your flat roof depends on several factors, such as your budget, the roof’s intended use, and how long you want the roof to last.
1. Building Regulations
Before choosing a material, check that your chosen roofing material meets local building regulations.
2. Planning Permission
Some roof materials, especially green roofs, may require planning permission, especially if the roof is visible from the street.
3. Health and Safety Regulations
Certain materials, like torch-on felt, require professional installation for safety reasons.
4. Insurance and Guarantees
Always check the insurance requirements and any guarantees offered by the manufacturer or installer.
5. Energy Efficiency and Sustainability
Green roofs offer excellent energy efficiency and sustainability benefits, while other materials like EPDM and GRP are highly durable and energy-efficient.
6. Regulations for Flat Roofs
Ensure that your roof complies with flat roof regulations, which may vary depending on the material and your location.
7. Insurance Requirements for Contractors
Make sure your contractor has insurance to cover any potential damage or accidents during installation.
Conclusion
In conclusion, the best flat roof material for you depends on your specific needs and budget. If you’re looking for a cost-effective solution, roofing felt is a great choice. For durability and longevity, EPDM and GRP are excellent options. If sustainability is important to you, consider a green roof. And for an accessible and unique outdoor space, flat roof decking can transform your roof into a relaxing retreat.
Choosing the right flat roof material will ensure that your investment lasts and provides reliable protection for years to come. If you’re still unsure, don’t hesitate to consult a roofing professional for expert advice tailored to your project.
FAQs About Roof Materials
What is EPDM roofing?
EPDM is a synthetic rubber membrane known for its durability and long lifespan. It’s a great choice for flat roofs due to its weather resistance and low maintenance.
What is GRP roofing?
GRP is a strong, lightweight material made from polyester resin and fibreglass. It’s known for its seamless finish and resistance to impacts and weather.
Can I install a flat roof myself?
Yes, certain materials like roofing felt and self-adhesive felt are DIY-friendly. However, more complex materials like torch-on felt or GRP should be installed by professionals.
What should I do if my roof starts leaking?
If your company roof starts leaking it is best to bring in an expert to find all the leaks and keep company business transparent, we offer such experience and transparency, you can book a call with us to discuss times and prices. Otherwise, you could get away with finding and temporarily dealing with the leak yourself by visiting our article on how to deal with roof leaks, or why your flat roof is leaking.
About Integritest
IntegriTest has a reputation for being professional, collaborative, precise and thorough in our inspections and testing. We are trusted by manufacturers, latent defect insurers, principal contractors, waterproofing contractors and estate management companies across the UK to perform our varied services.
Article written by Ben Flood